2008-12-28 20:20:22 +00:00
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/* twister512.S */
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/*
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2009-02-04 13:50:15 +00:00
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This file is part of the AVR-Crypto-Lib.
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2008-12-28 20:20:22 +00:00
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file twister512.S
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* \email daniel.otte@rub.de
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* \author Daniel Otte
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* \date 2008-12-28
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* \license GPLv3 or later
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*
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*/
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#include "avr-asm-macros.S"
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/*********************************************************************/
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/* void twister384(void* dest, void* msg, uint32_t msg_length_b) */
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/*
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* param dest: r24:r25
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* param msg: r22:r23
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* param msg_length_b: r18:r21
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*/
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CTX_SAVE0 = 10
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CTX_SAVE1 = 11
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DST_SAVE0 = 14
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DST_SAVE1 = 15
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MSG_LEN0 = 16
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MSG_LEN1 = 17
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MSG_LEN2 = 12
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MSG_LEN3 = 13
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MSG_SAVE0 = 28
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MSG_SAVE1 = 29
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.global twister512
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twister512:
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push_range 10, 17
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push r28
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push r29
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stack_alloc_large 64+2*8+64
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adiw r30, 1
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movw CTX_SAVE0, r30
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movw DST_SAVE0, r24
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movw MSG_SAVE0, r22
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movw MSG_LEN0, r18
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movw MSG_LEN2, r20
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movw r24, CTX_SAVE0
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ldi r22, lo8(512)
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ldi r23, hi8(512)
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2009-05-14 14:28:59 +00:00
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rcall twister_large_init
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2008-12-28 20:20:22 +00:00
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1:
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tst MSG_LEN3
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brne 2f
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tst MSG_LEN2
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brne 2f
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cpi MSG_LEN1, 2
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brmi 3f
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2:
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movw r24, CTX_SAVE0
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movw r22, MSG_SAVE0
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2009-05-14 14:28:59 +00:00
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rcall twister_large_nextBlock
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2008-12-28 20:20:22 +00:00
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adiw MSG_SAVE0, 63
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adiw MSG_SAVE0, 1
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subi MSG_LEN1, 2
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sbc MSG_LEN2, r1
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sbc MSG_LEN3, r1
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rjmp 1b
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3:
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movw r24, CTX_SAVE0
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movw r22, MSG_SAVE0
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movw r20, MSG_LEN0
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2009-05-14 14:28:59 +00:00
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rcall twister_large_lastBlock
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2008-12-28 20:20:22 +00:00
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movw r24, DST_SAVE0
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movw r22, CTX_SAVE0
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ldi r20, lo8(512)
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ldi r21, hi8(512)
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2009-05-14 14:28:59 +00:00
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rcall twister_large_ctx2hash
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2008-12-28 20:20:22 +00:00
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stack_free_large2 64+2*8+64
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pop r29
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pop r28
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pop_range 10, 17
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ret
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